1.

Two resistors R_(1) and R_(2) can slide without friction along two parallel metal guides dierected at an angle alpha to the horizontal and separated by a distance b . The guides are not connected at the bottom as shown. The entire system is placed in an upwardmagnetic field which decreases with time as (dB)/(dx) = beta ,x = 0 and x - axis is along the guide as shown in the figure. The resistors are made to slide with a constant velocity v downwards . The emf induced due to decrease in B due to change in position only

Answer»

`beta` abv(CW)
`beta`abv (ACW)
`beta^(2)` av (CW)
`beta^(2)` av (ACW)

Solution :`epsilon = beta` abe in clockwise SENSE.
`THEREFORE` (B)


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